Add Conduit method for getting Diffusion lint messages

Test Plan: /conduit/method/diffusion.getlintmessages/, ran it, saw results.

Reviewers: epriestley, wez

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2038

Differential Revision: https://secure.phabricator.com/D3932

src/__phutil_library_map__.php

@@ -139,6 +139,7 @@ phutil_register_library_map(array(
     'ConduitAPI_differential_updateunitresults_Method' => 'applications/conduit/method/differential/ConduitAPI_differential_updateunitresults_Method.php',
     'ConduitAPI_diffusion_findsymbols_Method' => 'applications/conduit/method/diffusion/ConduitAPI_diffusion_findsymbols_Method.php',
     'ConduitAPI_diffusion_getcommits_Method' => 'applications/conduit/method/diffusion/ConduitAPI_diffusion_getcommits_Method.php',
+    'ConduitAPI_diffusion_getlintmessages_Method' => 'applications/conduit/method/diffusion/ConduitAPI_diffusion_getlintmessages_Method.php',
     'ConduitAPI_diffusion_getrecentcommitsbypath_Method' => 'applications/conduit/method/diffusion/ConduitAPI_diffusion_getrecentcommitsbypath_Method.php',
     'ConduitAPI_feed_publish_Method' => 'applications/conduit/method/feed/ConduitAPI_feed_publish_Method.php',
     'ConduitAPI_feed_query_Method' => 'applications/conduit/method/feed/ConduitAPI_feed_query_Method.php',
@@ -1428,6 +1429,7 @@ phutil_register_library_map(array(
     'ConduitAPI_differential_updateunitresults_Method' => 'ConduitAPIMethod',
     'ConduitAPI_diffusion_findsymbols_Method' => 'ConduitAPIMethod',
     'ConduitAPI_diffusion_getcommits_Method' => 'ConduitAPIMethod',
+    'ConduitAPI_diffusion_getlintmessages_Method' => 'ConduitAPIMethod',
     'ConduitAPI_diffusion_getrecentcommitsbypath_Method' => 'ConduitAPIMethod',
     'ConduitAPI_feed_publish_Method' => 'ConduitAPIMethod',
     'ConduitAPI_feed_query_Method' => 'ConduitAPIMethod',

src/applications/conduit/method/diffusion/ConduitAPI_diffusion_getlintmessages_Method.php

@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * @group conduit
+ */
+final class ConduitAPI_diffusion_getlintmessages_Method
+  extends ConduitAPIMethod {
+
+  public function getMethodStatus() {
+    return self::METHOD_STATUS_UNSTABLE;
+  }
+
+  public function getMethodDescription() {
+    return "Get lint messages for existing code.";
+  }
+
+  public function defineParamTypes() {
+    return array(
+      'arcanistProject' => 'required string',
+      'branch'          => 'optional string',
+      'commit'          => 'optional string',
+      'files'           => 'required list<string>',
+    );
+  }
+
+  public function defineReturnType() {
+    return 'list<dict>';
+  }
+
+  public function defineErrorTypes() {
+    return array(
+    );
+  }
+
+  protected function execute(ConduitAPIRequest $request) {
+    $project = id(new PhabricatorRepositoryArcanistProject())->loadOneWhere(
+      'name = %s',
+      $request->getValue('arcanistProject'));
+    if (!$project || !$project->getRepositoryID()) {
+      return array();
+    }
+
+    $branch_name = $request->getValue('branch');
+    if ($branch_name == '') {
+      $repository = id(new PhabricatorRepository())
+        ->load($project->getRepositoryID());
+      $branch_name = $repository->getDefaultArcanistBranch();
+    }
+
+    $branch = id(new PhabricatorRepositoryBranch())->loadOneWhere(
+      'repositoryID = %d AND name = %s',
+      $project->getRepositoryID(),
+      $branch_name);
+    if (!$branch || !$branch->getLintCommit()) {
+      return array();
+    }
+
+    $lint_messages = queryfx_all(
+      $branch->establishConnection('r'),
+      'SELECT path, line, code FROM %T WHERE branchID = %d AND path IN (%Ls)',
+      PhabricatorRepository::TABLE_LINTMESSAGE,
+      $branch->getID(),
+      $request->getValue('files'));
+
+    // TODO: Compare commit identifiers of individual files like in
+    // DiffusionBrowseFileController::loadLintMessages().
+
+    return $lint_messages;
+  }
+
+}